Diablo 4.5 in. Diamond Wheel for Metal Cutting – #THDProSpective

Diablo diamond wheel 4.5 inch/5 inch


   Home Depot sent us some of these wheels for review in the THD Prospective program.  We have complete freedom to say anything we want about these products.  I urge you to read the full article to see if these are right for you because I feel these are good for some applications but not for all.  

   Mini grinders have long been one of my favorite tools because they are so useful for so many things.  We cut metal with them, we grind welds, we cut concrete and block with them. We also use them on tile installation for cutting cement backer board and tile.  I also use them for coping miters on trim installation. 

   Since they are so useful for so many trades they are found on many trucks, whether it be a metal fab truck or a plumber or electrician’s truck or an HVAC contractor or even a general contractor/remodeler.

   One wheel that is especially dangerous on a mini grinder is a metal cut off wheel. The bonded abrasive disks are fragile and can explode if they are dropped or tweaked in a cut.  The resulting shrapnel spinning at 9,000 + RPM can cause serious injury or even death.  There are dozens of photos on the Internet of people who have cut off wheels stuck in their cheek or other parts of their body.  If you choose to search for those do so at your own risk.

   Diablo Tools has developed some steel body cut off wheel with bonded diamond grit as the cutting media.  This is a welcome advancement for tradespeople who need an occasional cut off wheel and do not feel so safe with the bonded discs.  It is not meant as a heavy-duty all day long cut off wheel.  We tried them on some 1/2″ solid rod.  They are okay on the 1/2″ for intermittent cutting but I feel they are more for thinner materials. They are designed with a continuous rim and with heavy cutting they can warp on you.  I suggested to Diablo project managers to add a segmented rim or some expansion slots.  I feel they will come out in successive generations of this wheel.  Whether or not they are right for you depends on the application.  For extended cutting and heavy-duty use Diablo Tools makes several fine quality carbide blades. 

   These new cutting wheels are very thin and are an easy load on your cordless grinder.  This makes it very convenient for grab and go cutting needs.  The continuous diamond rim gives you a consistent depth of cut whether it is brand new or you have done 100 cuts.  The steel body means you can use them with regular safety glasses. Even though they are not as fast as a regular bonded abrasive slicer wheel they can actually be faster because you don’t have to go look for your full face shield to make a few cuts. 

   I found it handy for cutting nails, screws and staples after removing water damaged underlayment and drywall. It will also cut the tops of your anchor bolts off above the nut.  It will do hog wire and concrete mesh.  It will also do rebar if you don’t try to cut anything larger than 1/2″.  One thing I do not recommend cutting with it is threaded rod because it leaves too much of a burr.

   Most of the benefits of these cutting wheels center on safety and convenience.  It is very convenient to be able to just keep this wheel on your grinder and throw it in your toolbox for when you need it.  That is something you cannot do with a bonded abrasive wheel and expect it to be safe.  It is also very nice to be able to cut without a full face shield.  Here are some points from the manufacturer for consideration.

  • Diamond rimmed wheels deliver up to 100X longer cutting life and durability when compared to one standard bonded cut-off disc
  • Advanced Electro-Plating Process for even distribution of diamond abrasive cutting edge
  • Maintains cutting diameter for consistent cutting results
  • Diamond technology is safer to use versus bonded discs by providing more control, less sparks and less dust
  • Diamond wheels do not shatter or break when dropped
  • Ideal for cutting rebar, angle iron, cast iron and steel bar
  • For use on angle grinders with a max RPM of 13,280
  • 7/8 in. arbor
  • Available in four different sizes: 4-1/2 in., 5 in., 6 in. and 7 in.

The Home Depot

I review and recommend products to help you buy the stuff you need. If you make a purchase by clicking one of my links, I do earn a small commission. My pledge to you is this: I will always say what I really feel. I will not taint my reviews to make a quick buck at your expense. I want you to know the truth about the tools I review for the good or the bad.  My picks and opinions are independent from any business incentives.



2018-02-02T09:19:44-05:00October 25th, 2017|Accessories, Diablo Tools|45 Comments

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  1. Thomas Henry 11/09/2017 at 11:15 AM - Reply

    Pretty! This was a really wonderful post. Thank you for your provided information.

  2. Matt 10/31/2017 at 7:04 PM - Reply

    Nice review . Would be cool to see how they hold up to the standard cutoffs.


  3. John 10/31/2017 at 2:13 AM - Reply

    These would be interesting to give a try. IG = @ohiostatebuckeyefan

  4. Esther Peterson 10/29/2017 at 6:21 PM - Reply

    Have you ever thought about including a little bit more than just your articles?
    I mean, what you say is fundamental and all. However just imagine if you
    added some great photos or videos to give your posts more, “pop”!

    Your content is excellent but with pics and video clips, this website could
    definitely be one of the very best in its niche. Fantastic blog!

    • thetoolpig 10/29/2017 at 6:40 PM - Reply

      Thank you – if you visit most of the posts they all either have videos, pics on each and we try to make them pop

  5. Shaun 10/28/2017 at 8:52 AM - Reply


  6. Canadianplumber 10/28/2017 at 8:34 AM - Reply


  7. Andrew Kline 10/28/2017 at 7:42 AM - Reply

    Diablo is the way to go for any kind of blades. I use them I mg sawzawl, table saw and chop saw. Have not seen these but would love to give them a go. After reading your review I’m sure they would live up to the expectations.

  8. Aaron Balkema 10/28/2017 at 6:47 AM - Reply

    I would love to give this style of wheel a try. IG balkema_construction

  9. Stephen barlow 10/28/2017 at 5:30 AM - Reply


    These look like a safer alternative to bonded discs. Do they have a thin cut like you get with the skinny bonded discs or are they thick?

    • thetoolpig 10/28/2017 at 9:21 AM - Reply

      Very thin.

  10. Gino Dalesio 10/28/2017 at 2:39 AM - Reply

    #gino_dalesio_renovations, I’d be interested in trying one of these, they look like an improvement from the existing metal cut offs, I’m always afraid that they will detonate

  11. Mike Hood 10/27/2017 at 10:34 PM - Reply


  12. Justin lathan 10/27/2017 at 9:56 PM - Reply


  13. Ozzy 10/27/2017 at 9:39 PM - Reply

    Nice. Would really like to try one. @rocktapefinish on IG

  14. Will 10/27/2017 at 9:20 PM - Reply


  15. Brooks 10/27/2017 at 9:10 PM - Reply


  16. b.bottesi 10/27/2017 at 9:01 PM - Reply

    I’d love to try these !
    Diablo has always had great products and I look forward to trying this out .

  17. Rob 10/27/2017 at 8:56 PM - Reply

    This would be a great wheel to try in duct work. I like the reviews. Instagram: gierbox

  18. Zach miller 10/27/2017 at 7:10 PM - Reply


  19. Phil courtney 10/27/2017 at 5:46 PM - Reply

    I appreciate your honest reviews and tool fight videos. I will definitely have to give one of these a try. @cretewrxalaska

  20. Stephen sipkens 10/27/2017 at 5:04 PM - Reply

    This would be so handy @stevesipkens

  21. Levon Cullen 10/27/2017 at 4:49 PM - Reply

    So much nicer than the abrasive wheels. @lvnthmsclln

  22. Blythe 10/27/2017 at 3:20 PM - Reply

    I haven’t tried one yet, still have a big stack of thin disks, but I really want to for the reasons you listed

  23. Kris Mauro 10/27/2017 at 2:52 PM - Reply

    I have been a victim of many close calls with traditional cut off wheels. Always wear PPE and use the guard. Thanks Diablo for taking a step in the right direction.


  24. Joey Taylor 10/27/2017 at 2:39 PM - Reply

    Nice review. Looking forward to trying it out.

    instagram follower #joeyltaylor

  25. Craig 10/27/2017 at 2:11 PM - Reply

    We have an old vw caddy mk1 to restore and these would be ideal for cutting/chopping sections out.

  26. Nate Hollow 10/27/2017 at 1:45 PM - Reply

    Great article on these blades, i could find about 101 uses for those. I also really like the article about the Makita cordless router. Ive been waiting in vain for DeWalt to come out with one but i guess ill have to grab the Makita instead! IG: thehollowfurnitureco

  27. Pat mcgrath 10/27/2017 at 1:39 PM - Reply

    Sorry pmmcgrath11

  28. Pat mcgrath 10/27/2017 at 1:36 PM - Reply


  29. Tanner 10/27/2017 at 1:25 PM - Reply

    Great review, I never thought of using these for coping when doing trim, need to try that ASAP. Keep up the good work! Insta handle: oilersfan74

    • Toolpig 10/31/2017 at 7:01 AM - Reply

      For coping we use a 24 or 36 grit sanding disc with a backing pad. I usually trim the backing pad slightly

  30. Josh marsh 10/27/2017 at 1:21 PM - Reply

    really like the idea of being able to keep it on your grinder when you throw it back in the bag for storage. Sounds like a neat idea. Would love to try them

  31. Casey 10/27/2017 at 1:06 PM - Reply

    Never used this style of wheel before but I think the advantages are obvious.
    IG maint_mech15

  32. Ian 10/27/2017 at 1:03 PM - Reply

    Would enjoy trying out these new Diablo cutoff wheels @obs_ian

  33. Ross WILLIAMS 10/27/2017 at 12:52 PM - Reply

    I’ve been welding for several years and the 4.5 inch grinder was always at my side . I’m looking forward to using this wheel , I didn’t see a thickness on this disc . The thinner the better and more precise of a cut you get . And yes ppe is very important gloves ,face and eye protection .

    • thetoolpig 10/27/2017 at 12:56 PM - Reply

      If you try one let me know your thoughts. I don’t feel they are ready for the big time with welders yet. They need a few tweaks.

  34. Anton Bichis 10/27/2017 at 12:50 PM - Reply

    I just bought a new makita grinder and these wheels Would be just awesome!!
    IG -namn: Anton.bichis

  35. Odgfjgunner 10/27/2017 at 12:26 PM - Reply

    Nice write up. I can see many uses for these.

  36. David N 10/27/2017 at 12:23 PM - Reply

    Finally!!!! 🙂
    Im an apprentice @ a landscape con. firm and have heard many stories of discs slightly broken leading to a no bueno situation. Thanks for the heads up! A young buck my teach the teacher something new! @da_chavito27

  37. Andy Yergler 10/27/2017 at 12:18 PM - Reply


  38. Josh 10/27/2017 at 12:14 PM - Reply

    I think these would suit my needs. The pics I have seen of exploded abrasive wheels keeps me very aware of the condition of my wheels while using my grinder.
    Ig @baldybarton

  39. Tony 10/27/2017 at 12:09 PM - Reply


  40. Robert Niemiec 10/27/2017 at 12:08 PM - Reply

    These will be great for metal work on vehicles, saves time from having to change blades so often !
    IG: R_t_n_1

  41. Austin werrmann 10/26/2017 at 11:19 AM - Reply

    I like these. I have seen some bad pictures of abrasive wheels exploding and sticking out of someone’s face. These seem a lot safer

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